Means for controlling elevators



(No Model.)

' J. I. VEEDER.

MEANS FOR CONTROLLING ELEVATORS. No. 372,280. Patented Oct. 25, 1887.

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UNITED STATES PATENT OEErcE.

JOHN IRWIN VEEDER, OF CHICAGO, ILLINOIS, 'AS SIGNOR TO THE CRANE ELEVATOR COMPANY, OF ILLINOIS.

MEANS FOR CONTROLLING ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 372,280, dated October 25, 1887.

Application filed April 2, 1887. Serial No. 233,410. (No model.)

To aZZ whom it may concern.-

Be it known that I, JOHN IRWIN VEEDER, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Means for Controlling the Operation of Elevators, of which the following is afull specification.

My invention relates to that class of valvecontrol apparatus in which two standing cables IO are employed, by the alternate shortening of which the valves are operated. Y

My invention consists in the application to a valve-control gear of the class described 'of weighting devices, whereby the tensionof the operating cables is constantly maintained, whatever may be the variations in length of the cables,from alterations-in temperature, &c. or from wear, and whereby the accuracy of the action of the cables upon the valve is preserved,

so long as the variations in length of the two cables are respectively equal. As both control cables are of the same material and exposedto like conditions,it is evident thatt-he differences in their variation will be comparatively slight and will require adjustment only at long intervals.

In the drawings, Figure 1 is a side view of an elevator-car and so much of the control apparatus as is needed to illustrate my invention. Fig. 2 is a view of the car from above.

1 is the elevator-car suspended by the hoisting-rope 2, which passes over. sheave 3, sup ported by beam 4. Tothe beam 4,0r any other fixed support, are fastened the control-cables 5 5 and 6. Control-cable 5 passes downward under sheave 19, over sheave 18, thence to one end of lever 7. Control-cable 6 passes under sheave 18 and over sheave 19, thence to the other end of lever 7. Sheaves 18 and 19 are carried upon the extremities of the hand-lever fixed pivotal point, the parallelogram bounded by 9 S 11 10 is maintained as a parallelogram; but vertical movement of the pivot 8, caused by an equal stretching or contraction of the cables 5 6, is permitted without affecting the position of the point 10 of the valve-gear,and therefore without affecting the valve. The valve apparatus used for illustrating my invention, and marked 15, is well known in this art, one construction thereof being shown in Patent No. 314,720, to George H. Reynolds, and needs no further description. The weight 14c is suspended from the pivot 8, and it is thus in effect connected to both control-cables 5 and 6 and serves to maintain an equable tension on both.

I have shown the weight as attached to the lower endsof the control-cables; but it would be equally efficient if attached to their upper ends, as. shown in dotted lines, or in any equivalent manner by which the downward pull of the weight is converted into an upward strain on the cables. In this case the pivot 8 should be made a fixed point by attaching it 7 to any stationary part of the frame-work, a plate, 25, for so securing it, being shown in dotted line in Fig. 1.

The double cables 5 and 6 may be made of one continuous rope with fixed points, as iu- 8o dicated, instead of being out before being applied.

I claim- 1. In an elevator-control mechanism, the combination of double standing cables, a takeup device on the car, and a weight suspended from both said cables for maintaining their tension.

2. In an elevator-control mechanism, the combination, with the pivoted lever of a cable device by which the valve is shifted, of a radius-bar, such as 12, whereby vertical motion is allowed said lever without disturbing the operation of the valve by said lever.

3. The combination, with the cables of an 5 elevator-control mechanism, of thelever 7, the suspended Weight 14, the radiusbar l2, and the "alvedever 13.

JOHN IRWIN VEEDER.

Witnesses:

P. H. T. Mason, J. H. RAYMOND. 

